AIRFRAME AND WORK MACHINE

摘要

PROBLEM TO BE SOLVED: To provide an airframe including an excellent function for holding liquid reductant for carrying out the reduction treatment of nitrogen oxide in the exhaust gas of an engine at an optimal temperature.SOLUTION: The airframe includes: an exhaust gas treatment device 24 for carrying out the reduction treatment of nitrogen oxide in the exhaust gas of an engine 21 installed in a machine room 19; and a reductant supply device 31 for supplying liquid reductant to the exhaust gas treatment device 24. The reductant supply device 31 includes: reductant supply piping 34 disposed from a liquid redundant supply source installed in a storage box 16 which does not receive the thermal effect of the engine 21 to the exhaust gas treatment device 24 in the machine room 19; an air duct pipe 35 installed around the reductant supply piping 34; and a blast device 38 for forcedly introducing cooling air to the air duct pipe 35. Heat transfer from a heat source to the reductant supply piping 34 is interrupted by the cooling air.